What is the meaning of the phrase "bust ones tail"?
Bernie's a little cranky since she's been working, like, 17 hours a day.
And I've got a lot on my plate, too, because I've been busting my tail playing Assassin's Creed. (The Big Bang Theory)

Question

Answer

It means working very hard.
In a more vulgar way, it is also said as "busting my ass."

The image is of someone working so hard that they've broken their backside.

Answer

Do something very diligently.

Ne manquez pas cette occasion d'apprendre une langue depuis chez vous. Découvrez notre sélection de professeurs de langues expérimentés et inscrivez-vous dès maintenant à votre premier cours !